Tube closure



FIG. 1 is a top plain view of a tube closure showing our design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a right side elevational view thereof; and,

FIG. 5 is a left side elevational view thereof.

The bottom and interior of the closure form no part of the claimed design. 

The ornamental design for a tube closure, as shown and described. 